WO2016201638A1 - Dispositif et procédé pour une sélection de réseau et une commutation de réseau - Google Patents

Dispositif et procédé pour une sélection de réseau et une commutation de réseau Download PDF

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Publication number
WO2016201638A1
WO2016201638A1 PCT/CN2015/081642 CN2015081642W WO2016201638A1 WO 2016201638 A1 WO2016201638 A1 WO 2016201638A1 CN 2015081642 W CN2015081642 W CN 2015081642W WO 2016201638 A1 WO2016201638 A1 WO 2016201638A1
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WO
WIPO (PCT)
Prior art keywords
network
speed
processor
information
speed information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/081642
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English (en)
Inventor
Zhonglin Wu
Chibing SHEN
Huaicheng ZHAO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tongyu Communication Inc
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Tongyu Communication Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tongyu Communication Inc filed Critical Tongyu Communication Inc
Priority to PCT/CN2015/081642 priority Critical patent/WO2016201638A1/fr
Priority to US15/736,295 priority patent/US10708841B2/en
Publication of WO2016201638A1 publication Critical patent/WO2016201638A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/025—Services making use of location information using location based information parameters
    • H04W4/027—Services making use of location information using location based information parameters using movement velocity, acceleration information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer

Definitions

  • the present disclosure relates to a telecommunication system and method and, more particularly, to a telecommunication system and method for network selection and switching.
  • Network selection and switching technology is one of the key technologies of mobile communication network.
  • a decision of network selection and network switching is made based on Reference Signal Received Strength (RSRP) or Reference Signal Received Quality (RSRQ) .
  • RSRP Reference Signal Received Strength
  • RSRQ Reference Signal Received Quality
  • the traditional network selection and switching technology based on RSRP and RSRQ may not provide an optimal network selection and switching scheme that satisfies various user requirements.
  • a network device communicating with user equipment (UE)
  • the network device includes a processor and a memory for storing instructions executable by the processor.
  • the processor is configured to request the UE to report speed information, receive a measurement report from the UE, the measurement report including speed information of the UE, and determine whether to switch network for the UE based on the speed information.
  • a method for use in a network device communicating with user equipment includes requesting the UE to report speed information, receiving a measurement report from the UE, the measurement report including speed information of the UE, and determining whether to switch network for the UE based on the speed information.
  • UE user equipment communicating with a network device.
  • the UE includes a processor and a memory for storing instructions executable by the processor.
  • the processor is configured to receive a request from the network device for reporting speed information, acquire speed information, and transmit the speed information to the network device.
  • FIG. 1 illustrates an exemplary telecommunication system in which various embodiments of the disclosure are applicable to be implemented.
  • FIG. 2 is a signaling diagram of a network selection and switching method, according to an exemplary embodiment of the disclosure.
  • FIG. 3 illustrates a flow chart of a method of network selection and switching, according to an exemplary embodiment of the disclosure.
  • FIG. 4 illustrates a schematic diagram of an apparatus for use in practicing exemplary embodiments of the disclosure.
  • FIG. 1 illustrates an exemplary telecommunication system 100 in which various embodiments of the disclosure are applicable to be implemented.
  • system 100 includes, e.g., a first evolved Node B (eNB) 111, a second eNB 112, and a third eNB 113.
  • First eNB 111 and second eNB 112 are controlled by a first Radio Network Controller (RNC) 115.
  • RNC Radio Network Controller
  • Third eNB 113 is controlled by a second RNC 116.
  • First through third eNBs 111-113 are associated with and serve a plurality of networks, and each network may correspond to a set of cells, such as ones of cells 120-129.
  • User equipment (UE) 130 is connected with a first network associated with first eNB 111.
  • UE User equipment
  • first eNB 111 is referred to as a serving eNB 111.
  • serving eNB 111 determines whether or not to switch the connection of UE 130 from the first network to another network.
  • system 100 illustrated in FIG. 1 includes one UE 130, three eNBs 111-113, and ten cells 120-129, those skilled in the art would appreciate that system 100 can include more or less than the number of devices illustrated in FIG. 1.
  • system 100 can include more or less than the number of devices illustrated in FIG. 1.
  • eNBs may be referred to or implemented as base stations or access points
  • UEs may be referred to or implemented as mobile terminals or access terminals.
  • FIG. 2 is a signaling diagram of a network selection and switching method 200, according to an exemplary embodiment of the disclosure. Referring to FIGS. 1 and 2, in the exemplary embodiment, before method 200 starts, UE 130 has connected to the network corresponding to cell 120.
  • serving eNB 111 transmits a Radio Resource Control (RRC) Connection Reconfiguration signal to UE 130 via first network 111 (step 210) , requiring UE 130 to report various measurement information to serving eNB 111.
  • RRC Radio Resource Control
  • serving eNB 111 may request UE 130 to report its location information and speed information to serving eNB 111.
  • UE 130 configures its connection to prepare for providing the measurement information requested by serving eNB 111 (step 212) . Then, UE 130 obtains measurement information to be reported to serving eNB 111 (step 214) . For example, UE 130 may measure values of Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ) on each one of downlink signals received from eNB 111 and adjacent eNBs, such as second eNB 112 and third eNB 113. UE 130 may also acquire its location and speed information.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • the UE 130 uploads a measurement report to serving eNB 111 to report the measurement information (step 216) .
  • the measurement report includes, e.g., the measured values of RSRP and RSRQ of the downlink signal from serving eNB 111, measured values of RSRP and RSRQ of adjacent cells, as well as the location and speed information of UE 130.
  • serving eNB 111 makes network selection and switching decision (step 218) . For example, serving eNB 111 determines whether to switch network for UE 130, and which network should UE 130 be connected with. If serving eNB 111 determines that UE 130 needs to switch network, serving eNB 111 transmits an RRC Connection Reconfiguration signal to UE 130 (step 220) , informing UE 130 about a network identification (ID) of the new network that UE 130 should be connected with (hereinafter referred to as “target network” ) .
  • ID network identification
  • UE 130 In response to receiving the RRC connection reconfiguration signal including the network ID of the target network, UE 130 configures its connection to connect to the target network (step 222) . After UE 130 is connected to the target network, UE 130 transmits an RRC Connection Reconfiguration Complete signal to serving eNB 111 (step 224) , informing serving eNB 111 that it has been connected to the target network.
  • UE 130 can acquire its location information using a wireless location system, and then determine its speed information based on the location information.
  • the wireless location system can be one of the following first, second, and third systems.
  • the first system is a network location system.
  • the network location system includes a plurality of fixed beacons that are communicating with a location server.
  • Each fixed beacon receives an uplink signal transmitted from UE 130 at substantially the same time, extracts location parameters from the uplink signal by using a same or similar method, and transmits the extracted location parameters to the location server.
  • the location server calculates the location information of UE 130 based on the location parameters transmitted from the fixed beacons, and transmits the location information to UE 130. In this process, UE 130 is only responsible for transmitting the uplink signal and does not participate in using the signal to obtain the location information.
  • the second system is a location system in UE 130.
  • UE 130 receives downlink signals simultaneously transmitted from a plurality of fixed beacons, extracts location parameters from the downlink signals, and transmits the extracted location parameters to a location server.
  • the location server calculates the location information of UE 130 based on the location parameters transmitted from UE 130, and transmits the location information to UE 130.
  • UE 130 maintains a state of active calling, and extracts the location parameters.
  • the third system is a network-assisted location system.
  • each one of a plurality of fixed beacons receives an uplink signal transmitted from UE 130 at substantially the same time, extracts location parameters from the uplink signal by using a same or similar method, and transmits the extracted location parameters to UE 130.
  • UE 130 then calculates its location information based on the location parameters transmitted from the fixed beacons. In such system, UE 130 not only transmits the uplink signal, but also calculates the location information by itself.
  • UE 130 can also acquire its speed information.
  • UE 130 may include a built-in sensor, such as a piezoelectric acceleration sensor, for measuring its acceleration information. UE 130 then calculates its speed information based on the acceleration information.
  • FIG. 3 illustrates a flow chart of a method 300 performed by serving eNB 111 to make network selection and switching decision, according to an exemplary embodiment of the disclosure.
  • serving eNB 111 performs method 300 when performing step 218 of method 200 (FIG. 2) .
  • serving eNB 111 determines which one of a plurality of pre-defined speed ranges does speed V of UE 130 belongs to (step 310) .
  • the plurality of pre-defined speed ranges may include [0, V1] , [V1, V2] , [V3, V4] , ..., [Vi, + ⁇ ) , where i is a positive integer, V1>0, V2>V1, V3>V2, and so on.
  • Serving eNB 111 also determines whether speed V of UE 130 is greater than a threshold speed V0 (step 312) . If speed V of UE 130 is not greater than threshold speed V0 (step 312: No) , then serving eNB 111 performs step 326, as described below.
  • serving eNB 111 determines whether an RSRP value of a downlink signal transmitted from serving eNB 111 to UE 130 is greater than a threshold value.
  • the RSRP value is included in the measurement report transmitted from UE 130 in step 216 (FIG. 2) .
  • the threshold value may be a noise level such as, e. g. 8 dB. If the RSRP value is not greater than 8 dB (step 314: No) , then serving eNB 111 determines that the communication between UE 130 and serving eNB 111 is lost, and method 300 ends.
  • serving eNB 111 selects a plurality of available networks that match the speed range of UE 130 (step 316) .
  • serving eNB 111 may include a storage device that is pre-stored with a map including the plurality of pre-defined speed ranges, a plurality of network IDs of neighboring networks, and mapping relationships between the plurality of speed ranges and the plurality of network IDs. In this way, once serving eNB 111 determines the speed range of UE 130, serving eNB 111 looks up the map to find the networks that match the speed range of UE 130.
  • Serving eNB 111 selects, from the plurality of available networks selected in step 316, one or more networks with a best available operating band (step 318) .
  • Serving eNB 111 may determine that low operating bands are preferred than high operating bands. For example, among networks with a first operating band of 700MHz and/or 900MHz, a second operating band of 1800MHz and/or 2100MHz, and a third operating band of 2600MHz, serving eNB 111 may first select the networks with the first operating band. If there is no network with the first operating band, serving eNB 111 may select the networks with the second operating band. If there is no network with the first and second operating bands, serving eNB 111 may select the networks with the third operating band.
  • serving eNB 111 selects, from the one or more networks selected in step 318, a network with a best available network type (step 320) .
  • Serving eNB 111 may determine that a 4G network is preferred than a 3G network, and a 3G network is preferred than a 2G network. For example, if serving eNB 111 has selected several networks with the first operating band in step 318, then serving eNB 111 may select a 4G network from among the networks with the first operating band, and identify the selected 4G network as the target network for UE 130.
  • Serving eNB 111 may also determine whether a speed offset VHYS of UE 130 is less than a threshold offset value (step 322) .
  • the speed offset is defined as the magnitude of change of speed V in a given time period. If the speed offset VHYS is not less than the threshold offset value (step 322: No) , then serving eNB 111 determines that the target network selected based on the speed V of UE 130 is not valid, since the speed V of UE 130 is changing significantly. Thus, serving eNB 111 determines not to switch network for UE 130 (step 324) .
  • serving eNB 111 determines whether any one of a plurality of measurement events has been triggered based on the measurement information included in the measurement report transmitted from UE 130 (step 326) .
  • Table 1 summarizes the plurality of measurement events.
  • Ms represents the signal strength of the serving cell
  • Ofs represents the frequency specific offset of the serving cell
  • Ocs represents the cell specific offset of the serving cell
  • Mn represents the signal strength of a neighboring cell
  • Ofs represents the frequency specific offset of the neighboring cell
  • Ocs represents the cell specific offset of the neighboring cell
  • Hys is the hysteresis parameter of the corresponding event
  • Thresh is the threshold parameter for the corresponding event.
  • serving eNB 111 determines not to switch network for UE 130 (step 324) . If a measurement event has been triggered (step 326: Yes) , then serving eNB 111 determines to switch network for UE 130 (step 328) . Then, method 300 ends.
  • serving eNB 111 determines to switch network for UE 130 and has selected a target network
  • serving eNB 111 proceed to step 220 illustrated in FIG. 2, to transmit an RRC Connection Reconfiguration signal to UE 130 to inform UE 130 about the network ID of the target network.
  • FIG. 4 illustrates a schematic diagram of an apparatus 400 for use in practicing exemplary embodiments of the disclosure.
  • apparatus 400 may be implemented as UE 130, or eNB 111, 112, or 113.
  • apparatus 400 includes a processor 410, a memory 420, and a transceiver 430.
  • Transceiver 430 includes one or more components that transmit and/or receive signals and messages from and to apparatus 400.
  • Memory 420 stores instructions that, when executed by processor 410, cause processor 410 to operate according to various embodiments of the disclosure.
  • Memory 420 also stores various data used by apparatus 400. For example, if apparatus 400 is implemented as serving eNB 111, memory 420 may store the map having the mapping relationships between the plurality of speed ranges and the plurality of network IDs.
  • Memory 420 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • Processor 410 may be of any type suitable to the local technical environment, and may comprise one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multi-core processor architectures, as non-limiting examples.
  • DSPs digital signal processors

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un dispositif de réseau et un procédé pour une sélection de réseau et une commutation de réseau. Le dispositif de réseau communique avec un équipement utilisateur (UE). Le dispositif de réseau comprend un processeur et une mémoire pour stocker des instructions pouvant être exécutées par le processeur. Le processeur est configuré pour demander à l'UE de rapporter des informations de vitesse, recevoir un rapport de mesure à partir de l'UE, le rapport de mesure comprenant des informations de vitesse de l'UE, et déterminer s'il faut ou non commuter le réseau pour l'UE sur la base des informations de vitesse.
PCT/CN2015/081642 2015-06-17 2015-06-17 Dispositif et procédé pour une sélection de réseau et une commutation de réseau Ceased WO2016201638A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2015/081642 WO2016201638A1 (fr) 2015-06-17 2015-06-17 Dispositif et procédé pour une sélection de réseau et une commutation de réseau
US15/736,295 US10708841B2 (en) 2015-06-17 2015-06-17 Device and method for network selection and network switching

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Application Number Priority Date Filing Date Title
PCT/CN2015/081642 WO2016201638A1 (fr) 2015-06-17 2015-06-17 Dispositif et procédé pour une sélection de réseau et une commutation de réseau

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Cited By (1)

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US10708841B2 (en) 2020-07-07

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